SL2035中文资料

DS5117 Issue 2.1 October 1999SL2035High Performance Broadband DownconverterPreliminary InformationOrdering InformationSL2035/IG/MP1S (Tubes)SL2035/IG/MP1T (T ape and Reel)FeaturesG Single Chip Broadband Solution G Wide Dynamic Range RF InputG Low Phase Noise Balanced Internal Local Oscillator G High Frequency Range: 1 to 1·3 GHzGESD Protection 2kV min., MIL-STD-883B Method 3015Cat.1 (Normal ESD handling procedures should be observed)ApplicationsG Double Conversion Tuners G Digital T errestrial Tuners G Data Transmit SystemsGData Communications SystemsThe SL2035 is a bipolar, broadband wide dynamic range mixer oscillator, optimised for applications as the downconverter in double conversion tuner systems. It also has application in any system where a wide dynamic range broadband frequency converter is required.The SL2035 is a single chip containing all necessary active circuitry and simply requires an external tuneable resonant network for the local oscillator. The block diagram is shown in Figure 1 and pin connections are shown in Figure 2.In normal application the signal from the high IF output is connected to the RFIN and RFIN inputs. The RF input preamplifier of the device is designed for low noise figure within the operating region and for high intermodulation distortion intercept so offering good signal to noise plus composite distortion spurious performance.The preamplifier also provides gain to the mixer section and back isolation from the local oscillator section. The approximate model of the RF input is shown in Figure 3.Absolute Maximum RatingsSupply voltage, V CCRF differential input voltage All I/O port DC offset Storage temperature Junction temperaturePackage thermal resistance Chip to ambient, θJA Chip to case, θJC20·3V to 17V2·5V20·3 to V CC 10·3V 255°C to 1150°C1150°C20°C/W 80°C/WThe output of the preamplifier is fed to the mixer section which is optimised for low radiation application. In this stage the RF signal is mixed with the local oscillator frequency,which is generated by an on-chip oscillator. The oscillator block uses an external tuneable network and is optimised for low phase noise. A typical application is shown in Figure 5. This block also contains a buffer-amplifier to interface with an external PL L to allow for frequency synthesis of the local oscillator.The IF output can be loaded either differentially or single-ended. It is recommended that the differential load as in Figure 5 is applied as this gives best noise performance. If the output is loaded single-ended the noise figure will be degraded. The approximate model of the IF output is shown in Figure 4.In application care should be taken to achieve symmetric balance to the IF outputs to maximise intermodulation performance.Figure 1 SL2035 block diagram2SL2035Figure 2 Pin connections - top viewQuick Reference DataAll data applies with circuit component values given in T able 1CharacteristicValue Units Electrical CharacteristicsTamb = 240°C to 185°C, V CC = 5V 65%, V EE = 0V. These characteristics are guaranteed by either production test or design. They apply within the specified ambient temperature and supply voltage ranges unless otherwise stated.CharacteristicConditionsMax.Min.ValueTyp.Units IF output pins 1 and 16 will be nominally connected to V CC through the differential balun load as in Figure 5Operating condition onlySee Figure 3See Note 1T AMB = 27°C, with input matching network as in Figure 5.With differential load Differential voltage gain to 50Ω load on output of impedance transformer as in Figure 5Channel bandwidth 8MHz within operating frequency range995-1305MHz See Note 1Application as Figure 5. See Note 2Application as Figure 5Application as Figure 5Compatible with all standard IF frequencies,determined by applicationPin 9913002211312140·52201251·4288TBA 609,11,147,87,87,87,812,131,16100027981160·929530971011118290mAMHz dB µVdB dB dB dB dB dB µV GHz dBc/Hz dBc/Hz MHz Supply currentInput frequency rangeComposite peak input signal Input impedance Input return loss Input noise figureConversion gain Gain variation within channelThrough gainIIP3LO operating range LO phase noise, 10kHz offsetLO phase noise floorIF output frequency range cont …NOTES1. Any two tones within RF operating range at 92dB µV with output load as in Figure 5.2. Use low side LO injection.RF input operating frequency range Input noise Figure, SSB Conversion gain IIP3 input referred P1dB input referredLO phase noise at 10 kHz offset, f RF 1 to 1·3GHz, application as in Figure 51000-13001211118106,290MHz dB dB dB µV dBc dBc/Hz3SL2035Electrical Characteristics (continued)9525CharacteristicT o device input T o device input Into 50Ω load See Figure 4ConditionsMax.Min.ValueUnits dB µV dB µV dB µV ΩΩTyp.729275LO and harmonic leakage to RF input Fundamental 2nd harmonicLO Prescaler output swingLO Prescaler output impedance IF output impedancePin7,87,810101,16Figure 3 Approximate model of RF input Figure 4 Approximate model of IF outputApplication NotesFigure 5 shows the SL 2035 in a typical downconverter application.The network connected to RF input pin 7 and pin 8 is to improve the matching between the device input and the source. The source would normally be from the 1·1MHz IF output of the upconverter (SL2030) via passive BPF and gain stage all designed for 50Ω characteristic impedance.The network connected to the IF output pin 1 and pin 16 is a narrow band tuned balun centred typically on 40MHz.This matches the device output impedance of nominally 400Ω (balanced) to 50Ω (unbalanced).The network connected to the LO pin 12 and pin 13 is a varactor diode loaded resonant microstrip line resonator.Fine adjustment of the tuning range can be achieved by physically moving C19 (see Figure 5) closer to the LO pins.This extends the bottom end of the tuning range.It is important to provide good decoupling on the 5V supplies and to use a layout which provides some isolation between the RF, IF and LO ports.SL2035Figure 5 SL2035 upconverter application 45SL2035Table 1 Component values for Figure 5Figure 6 Microstrip resonator (dimensions are in mm)C41C42C43C46C47D1L3L5L6L7L8L9L10L11R7R8R9R10R11R12S1T1X1C1C2C3C4C5C8C9C10C11C13C14C15C17C18C19C21C22C23C24C30C31C34C36C37C38Component1nF 1nF 1 nF 10nF 56pF 100pF 100pF 100pF 10µF 100nF 100nF 100pF 100nF 100nF 2pF 1nF 33nF 47pF 1nF 18pF 330nF 100nF 56pF NC 100nFValue/type Component4·7µF 3·3nF 100nF 100pF 100pF IT397220nH 1·8nH 220nH 220nH 1µH 220nH 680nH 680nH 15k Ω22k Ω15k Ω1k Ω4·7k Ω50ΩResonator (Figure 6)BCW314MHz crystalValue/typeWorld Headquarters - CanadaTel: +1 (613) 592 2122Fax: +1 (613) 592 6909North America Asia/Pacific Europe, Middle East, Tel: +1 (770) 486 0194T el: +65 333 6193and Africa (EMEA) Fax: +1 (770) 631 8213Fax: +65 333 6192Tel: +44 (0) 1793 518528Fax: +44 (0) 1793 518581 Information relating to products and services furnished herein by Mitel Corporation or its subsidiaries (collectively “Mitel”) is believed to be reliable. However, Mitel assumes no liability for errors that may appear in this publication, or for liability otherwise arising from the application or use of any such information, product or service or for any infringement of patents or other intellectual property rights owned by third parties which may result from such application or use. Neither the supply of such information or purchase of product or service conveys any license, either express or implied, under patents or other intellectual property rights owned by Mitel or licensed from third parties by Mitel, whatsoever.Purchasers of products are also hereby notified that the use of product in certain ways or in combination with Mitel, or non-Mitel furnished goods or services may infringe patents or other intellectual property rights owned by Mitel.This publication is issued to provide information only and (unless agreed by Mitel in writing) may not be used, applied or reproduced for any purpose nor form part of any order or contract nor to be regarded as a representation relating to the products or services concerned. The products, their specifications, services and other information appearing in this publication are subject to change by Mitel without notice. No warranty or guarantee express or implied is made regarding the capability, performance or suitability of any product or service. Information concerning possible methods of use is provided as a guide only and does not constitute any guarantee that such methods of use will be satisfactory in a specific piece of equipment. It is the user’s responsibility to fully determine the performance and suitability of any equipment using such information and to ensure that any publication or data used is up to date and has not been superseded. Manufacturing does not necessarily include testing of all functions or parameters. These products are not suitable for use in any medical products whose failure to perform may result in significant injury or death to the user. All products and materials are sold and services provided subject to Mitel’s conditions of sale which are available on request.M Mitel (design) and ST-BUS are registered trademarks of MITEL CorporationMitel Semiconductor is an ISO 9001 Registered CompanyCopyright 1999 MITEL CorporationAll Rights ReservedPrinted in CANADATECHNICAL DOCUMENTATION - NOT FOR RESALE。